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echo back last received packet on 20ms interval

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This commit is contained in:
Stephen Birarda 2013-01-16 15:56:31 -08:00
parent a533e505d3
commit 41c0790ffb
1 changed files with 47 additions and 22 deletions
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69
socket.cpp
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@ -19,6 +19,8 @@ const int SAMPLES_PER_PACKET = 512;
const int MAX_AGENTS = 1000;
const int LOGOFF_CHECK_INTERVAL = 1000;
const float BUFFER_SEND_INTERVAL = (SAMPLES_PER_PACKET/SAMPLE_RATE) * 1000;
char* packet_buffer;
sockaddr_in address, dest_address;
@ -45,7 +47,7 @@ int create_socket()
int handle = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (handle <= 0) {
printf( "failed to create socket\n" );
printf("Failed to create socket: %d\n", handle);
return false;
}
@ -75,7 +77,8 @@ int addAgent(sockaddr_in dest_address) {
int i = 0;
for (i = 0; i < num_agents; i++) {
if (dest_address.sin_addr.s_addr == agents[i].agent_addr.sin_addr.s_addr) {
if (dest_address.sin_addr.s_addr == agents[i].agent_addr.sin_addr.s_addr
&& dest_address.sin_port == agents[i].agent_addr.sin_port) {
break;
}
}
@ -107,40 +110,46 @@ void update_agent_list(timeval now) {
}
}
struct send_buffer_struct {
int socket_handle;
};
void *send_buffer_thread(void *args)
{
// create our send socket
int handle = create_socket();
if (!handle) {
std::cout << "Failed to create buffer send socket.\n";
// return 0;
} else {
std::cout << "Buffer send socket created.\n";
}
struct send_buffer_struct *buffer_args = (struct send_buffer_struct *) args;
int handle = buffer_args->socket_handle;
int sent_bytes;
timeval last_send, now;
while (1) {
// sleep for the length of a packet of audio
usleep((SAMPLES_PER_PACKET/SAMPLE_RATE) * pow(10, 6));
gettimeofday(&last_send, NULL);
gettimeofday(&now, NULL);
while (true) {
while (diffclock(last_send, now) < BUFFER_SEND_INTERVAL) {
// loop here until we're allowed to send the buffer
gettimeofday(&now, NULL);
}
// send out whatever we have in the buffer as mixed audio
// to our recent clients
for (int i = 0; i < num_agents; i++) {
if (agents[i].active) {
sockaddr_in dest_address = agents[i].agent_addr;
sent_bytes = sendto(handle, packet_buffer, MAX_PACKET_SIZE,
0, (sockaddr *) &dest_address, sizeof(dest_address));
0, (sockaddr *) &dest_address, sizeof(sockaddr_in));
if (sent_bytes < MAX_PACKET_SIZE) {
std::cout << "Error sending mix packet!\n";
}
}
}
}
gettimeofday(&last_send, NULL);
}
pthread_exit(0);
}
struct process_arg_struct {
@ -164,6 +173,13 @@ void *process_client_packet(void *args)
pthread_exit(0);
}
bool different_clients(sockaddr_in addr1, sockaddr_in addr2)
{
return addr1.sin_addr.s_addr != addr2.sin_addr.s_addr ||
(addr1.sin_addr.s_addr == addr2.sin_addr.s_addr &&
addr1.sin_port != addr2.sin_port);
}
int main(int argc, const char * argv[])
{
timeval now, last_agent_update;
@ -190,8 +206,11 @@ int main(int argc, const char * argv[])
char packet_data[MAX_PACKET_SIZE];
struct send_buffer_struct send_buffer_args;
send_buffer_args.socket_handle = handle;
pthread_t buffer_send_thread;
pthread_create(&buffer_send_thread, NULL, send_buffer_thread, NULL);
pthread_create(&buffer_send_thread, NULL, send_buffer_thread, (void *)&send_buffer_args);
while (1) {
received_bytes = recvfrom(handle, (char*)packet_data, MAX_PACKET_SIZE,
@ -204,7 +223,13 @@ int main(int argc, const char * argv[])
pthread_t client_process_thread;
pthread_create(&client_process_thread, NULL, process_client_packet, (void *)&args);
pthread_join(client_process_thread, NULL);
pthread_join(client_process_thread, NULL);
if (addAgent(dest_address)) {
std::cout << "Added agent: " <<
inet_ntoa(dest_address.sin_addr) << " on " <<
dest_address.sin_port << "\n";
}
}
gettimeofday(&now, NULL);
@ -215,8 +240,8 @@ int main(int argc, const char * argv[])
}
}
// pthread_join(buffer_send_thread, NULL);
pthread_join(buffer_send_thread, NULL);
return 0;
}